IBM x3655 Service Guide - Page 181

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. System event/error log message Action System resetting due to unrecoverable error 1. Check the operator information panel and light path diagnostics LEDs. 2. Test the system with the minimum supported configuration before replacing parts. 3. (Trained service technician only) Replace the system board. CPU n over temperature n = the microprocessor number 1. Make sure that the fans are operating, that there are no obstructions to the airflow, that the air baffles are in place and correctly installed, and that the server cover is installed and completely closed. 2. Make sure that the heat sink for microprocessor n is installed correctly. 3. (Trained service technician only) Replace microprocessor n. CPU removal detected Information only. Take action as appropriate. CPU n non-critical over temperature warning n = the microprocessor number 1. Make sure that the fans are operating, that there are no obstructions to the airflow, that the air baffles are in place and correctly installed, and that the server cover is installed and completely closed. 2. Make sure that the heat sink for microprocessor n is installed correctly. CPU n non-recoverable over temperature fault 1. Make sure that the fans are operating, that there are no obstructions to the airflow, that the air baffles are in place and correctly installed, and that the server cover is installed and completely closed. 2. Make sure that the heat sink for microprocessor n is installed correctly. 3. (Trained service technician only) Replace microprocessor n. 4. (Trained service technician only) Replace the system board. VRD 1 critical over voltage fault 1. (Trained service technician only) Reseat microprocessor 1. 2. (Trained service technician only) Replace microprocessor 1. 3. (Trained service technician only) Replace the system board. VRD 1 critical under voltage fault 1. (Trained service technician only) Reseat microprocessor 1. 2. (Trained service technician only) Replace microprocessor 1. 3. (Trained service technician only) Replace the system board. VRD 2 critical over voltage fault VRD 2 = VRM 1. (Trained service technician only) Reseat microprocessor 2. 2. (Trained service technician only) Replace microprocessor 2. 3. (Trained service technician only) Replace the system board. VRD 2 critical under voltage fault VRD 2 = VRM 1. (Trained service technician only) Reseat microprocessor 2. 2. (Trained service technician only) Replace microprocessor 2. 3. (Trained service technician only) Replace the system board. Chapter 5. Diagnostics 163

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v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
Chapter
4,
“Parts
listing,
System
x3655,
Type
7985,”
on
page
97
to
determine
which
components
are
customer
replaceable
units
(CRU)
and
which
components
are
field
replaceable
units
(FRU).
v
If
an
action
step
is
preceded
by
“(Trained
service
technician
only),”
that
step
must
be
performed
only
by
a
trained
service
technician.
System
event/error
log
message
Action
System
resetting
due
to
unrecoverable
error
1.
Check
the
operator
information
panel
and
light
path
diagnostics
LEDs.
2.
Test
the
system
with
the
minimum
supported
configuration
before
replacing
parts.
3.
(Trained
service
technician
only)
Replace
the
system
board.
CPU
n
over
temperature
n
=
the
microprocessor
number
1.
Make
sure
that
the
fans
are
operating,
that
there
are
no
obstructions
to
the
airflow,
that
the
air
baffles
are
in
place
and
correctly
installed,
and
that
the
server
cover
is
installed
and
completely
closed.
2.
Make
sure
that
the
heat
sink
for
microprocessor
n
is
installed
correctly.
3.
(Trained
service
technician
only)
Replace
microprocessor
n
.
CPU
removal
detected
Information
only.
Take
action
as
appropriate.
CPU
n
non-critical
over
temperature
warning
n
=
the
microprocessor
number
1.
Make
sure
that
the
fans
are
operating,
that
there
are
no
obstructions
to
the
airflow,
that
the
air
baffles
are
in
place
and
correctly
installed,
and
that
the
server
cover
is
installed
and
completely
closed.
2.
Make
sure
that
the
heat
sink
for
microprocessor
n
is
installed
correctly.
CPU
n
non-recoverable
over
temperature
fault
1.
Make
sure
that
the
fans
are
operating,
that
there
are
no
obstructions
to
the
airflow,
that
the
air
baffles
are
in
place
and
correctly
installed,
and
that
the
server
cover
is
installed
and
completely
closed.
2.
Make
sure
that
the
heat
sink
for
microprocessor
n
is
installed
correctly.
3.
(Trained
service
technician
only)
Replace
microprocessor
n
.
4.
(Trained
service
technician
only)
Replace
the
system
board.
VRD
1
critical
over
voltage
fault
1.
(Trained
service
technician
only)
Reseat
microprocessor
1.
2.
(Trained
service
technician
only)
Replace
microprocessor
1.
3.
(Trained
service
technician
only)
Replace
the
system
board.
VRD
1
critical
under
voltage
fault
1.
(Trained
service
technician
only)
Reseat
microprocessor
1.
2.
(Trained
service
technician
only)
Replace
microprocessor
1.
3.
(Trained
service
technician
only)
Replace
the
system
board.
VRD
2
critical
over
voltage
fault
VRD
2
=
VRM
1.
(Trained
service
technician
only)
Reseat
microprocessor
2.
2.
(Trained
service
technician
only)
Replace
microprocessor
2.
3.
(Trained
service
technician
only)
Replace
the
system
board.
VRD
2
critical
under
voltage
fault
VRD
2
=
VRM
1.
(Trained
service
technician
only)
Reseat
microprocessor
2.
2.
(Trained
service
technician
only)
Replace
microprocessor
2.
3.
(Trained
service
technician
only)
Replace
the
system
board.
Chapter
5.
Diagnostics
163